In a post on their website, the type 1 diabetes charity warned that induction hobs, which use magnets to transfer the heat to cooking pans, could interfere with how insulin pumps work.

JDRF is recommending that anyone who has an insulin pump and is concerned should contact the manufacturer of the device.

Pump manufacturers have said the magnetic energy field can cause damage to the motor of the device.

Companies which make and sell insulin pumps are now being urged to print health warnings prominently on all their packaging and websites.

'Capital letter warnings'

Speaking to the Mail on Sunday newspaper, Dan Howarth who is head of care at Diabetes UK, said: "We would support very big capital letter warnings - they should not be in the small print at the very back."

JDRF also published existing warnings and safety advice by some of the leading makers of insulin pumps, including Medtronic and Animas.

Medtronic warned: "Do not expose your CGM to MRI equipment or other devices that generate strong magnetic fields," while Animas stated: "DO NOT expose the pump to very strong electromagnetic fields. ALWAYS remove the pump before entering an area where there are very strong magnets."